Diseño e implementación de un inversor de conexión a la red (grid-tie inverter) para paneles fotovoltaicos

Abstract

For the present project a single-phase Grid Tie Inverter will be designed. This inverter will directly connect a solar panel to the electric utility grid and will provide power to the connected loads and the excesses of energy, in case of existing, will be sent back to the electrical grid. In other words, if the photovoltaic panels are producing more energy that the attached local loads are using, the system will send the excess back to the grid, reducing the cost of energy taken from the grid. The project is designed as a demonstrative and didactic module, and will show the advantages of the use of solar panels as alternative source of energy, showing each of the stages of the energy processing in this application starting from the photovoltaic panels going thru the regulation and the change from direct to alternating current and the coupling to the grid. This project also shows the use of this type of systems to reduce the cost of energy taken from the utility grid. It is important to mention that this type of system will deliver energy to the load and the excess to the electrical grid, without the use of any energy storage device (batteries).